Quick overview from the supplier:
reflecta LED Light Pad A3 Super Slim incl. AC adapter
With the help of the reflecta Light Pads one can correct pictures, enhance sketches or monitor animation drawings. Small picture slides, stored in archive sleeves, can be viewed on the Light Pads without having to remove them from their casing. The Light Pad is an important device in printing, as well as in film, photo and tattoo studios. It can be used to place transparent material such as films or tracing paper over each other, fixate and then edit them.
While a hobby photographer may hold up a slide to the light, the professional or semi-professional photographer will use a Light Pad to view his material. For those who use film material (slides and negatives) of all types regularly, they will not get around the use of a light pad.
https://reflecta.de/en/led-light-pads/470-reflecta-led-light-pad-a3-super-slim.html
